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 *
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 * Copyright (c) 1999-2001 Apple Computer, Inc.  All Rights Reserved. The
 * contents of this file constitute Original Code as defined in and are
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/*
	File:		TCPListenerSocket.h

	Contains:	A TCP listener socket. When a new connection comes in, the listener
				attempts to assign the new connection to a socket object and a Task
				object. Derived classes must implement a method of getting new
				Task & socket objects
					
	
*/


#ifndef __TCPLISTENERSOCKET_H__
#define __TCPLISTENERSOCKET_H__

#include "TCPSocket.h"
#include "IdleTask.h"

class TCPListenerSocket : public TCPSocket, public IdleTask
{
	public:

		TCPListenerSocket() : 	TCPSocket(NULL, Socket::kNonBlockingSocketType), IdleTask(),
								fAddr(0), fPort(0), fOutOfDescriptors(false) {}
		virtual ~TCPListenerSocket() {}
		
		//
		// Send a TCPListenerObject a Kill event to delete it.
				
		//addr = listening address. port = listening port. Automatically
		//starts listening
		OS_Error		Initialize(UInt32 addr, UInt16 port);

		//You can query the listener to see if it is failing to accept
		//connections because the OS is out of descriptors.
		Bool16		IsOutOfDescriptors() { return fOutOfDescriptors; }

		//derived object must implement a way of getting tasks & sockets to this object 
		virtual Task*	GetSessionTask(TCPSocket** outSocket) = 0;
		
		virtual SInt64	Run();
			
	private:
	
		enum
		{
			kTimeBetweenAcceptsInMsec = 1000,	//UInt32
			kListenQueueLength = 128			//UInt32
		};

		virtual void ProcessEvent(int eventBits);
		OS_Error 	Listen(UInt32 queueLength);

		UInt32			fAddr;
		UInt16			fPort;
		
		Bool16			fOutOfDescriptors;
};
#endif // __TCPLISTENERSOCKET_H__

